forever_cc

摘要：You are given an integer array nums and you have to return a new counts array. The counts array has the property where counts[i] is the number of smal... 阅读全文

摘要：Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your... 阅读全文

摘要：Given a string array words, find the maximum value of length(word[i]) * length(word[j]) where the two words do not share common letters. You may assum... 阅读全文

摘要：变换灯泡颜色There are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle ... 阅读全文